GREAT PLAINS PL5700, Operator'S Manual

Page: 82 / 150

Great Plains | 411-681M | 04/08/2021 75
PL5700 Planter Table of Contents Index Troubleshooting
Seed Pool Recovery
When a seed meter has been starved of seed, the
back-flow of air through the open seed inlet gate
reduces delivery air flow. This causes seed delivery
to be slow. If you start or resume planting with an
empty seed pool, the delivery flow may be too low to
keep the meter supplied. The steps below quickly
prime the meter by rebuilding the seed pool.
1. Close the gate (1). This stops the air back-flow.
2. Clear the bridge (2) or blockage that caused the meter
to run empty.
3. Reconnect seed hose(s).
4. With the fan running, listen for seed to fall into the inlet
(3).
5. Wait for seed fall (4) to taper off and stop.
6. Open the gate to the operating setting.
7. Start or resume planting.

Seed Population Troubleshooting
1
29744A
2
3
4
Problem Cause Solution
Overall population
alarms.
False alarms or actual rate errors due to
console setup with incorrect row count or
spacing
Review planter configuration and console
setup.
Incorrect cell count Replace seed disks with correct disks, or
reset rate for current disks, if within range.
Improper gap on speed sensor Check speed sensor (page 14). An incorrect
gap can cause an erratic speed signal
causing the console to falsely report an
improper planting rate.
Incorrect speed sensor constant Perform speed calibration, see the console
manual.
Low population bands
or skips just after
turns.
Insufficient oil to the fan, meter pressures
low, seeds falling from disks
Perform end-of-pass marker and lift
operations separately. If already performing
separately, lift more gradually.
Mismatch between
reported and furrow
population.
Seed tube sensor is not counting all seeds Clean the seed tube of graphite and dust
buildup with seed tube brush. Replace
sensors that malfunction.
Seeds or revolution value in the console
setup does not match disk cell count
Correct the value or install correct disk.
Small seeds, such as milo, are not reliably
sensed in the seed tube
Run with rain covers in place to minimize
ambient light interference.
Use the population adjustment factor in the
console system to compensate for missed
seeds. For example, change the
Population
Adjustment
values from 100% to 130% as
needed. Remember to set this value back to
100% for large seeds.
Unable to adjust air
pressure low enough.
Meter pressure fan speed too high or seed
delivery fan speed too high
Adjust baffle at the fan.